When the boy first starts visiting the tree, he is 6 years old and 3 feet, 10 inches tall (or 3.83 feet). If
he is 6.7 feet away from the tree and his angle of
elevation to the top of the tree is 25.3°, how tall is the
tree when she first meets the boy?

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.